package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetMealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class CategoryServiceImpl implements CategoryService {

    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetMealMapper setMealMapper;


    @Override
    public PageResult page(CategoryPageQueryDTO dto) {
        PageHelper.startPage(dto.getPage(), dto.getPageSize());
        Page<Category> page = categoryMapper.page(dto);
        long total = page.getTotal();
        List<Category> result = page.getResult();
        return new PageResult(total, result);
    }

    @Override
    public void update(CategoryDTO dto) {
        Category category = new Category();
        BeanUtils.copyProperties(dto, category);
        category.setUpdateTime(LocalDateTime.now());
        category.setUpdateUser(BaseContext.getCurrentId());
        categoryMapper.update(category);
    }

    @Override
    public void updateByStatus(Integer status, Long id) {

        categoryMapper.updateByStatus(status, id);
    }

    @Override
    public void insert(CategoryDTO dto) {
        Category category = new Category();
        BeanUtils.copyProperties(dto, category);
        category.setUpdateTime(LocalDateTime.now());
        category.setUpdateUser(BaseContext.getCurrentId());
        category.setCreateTime(LocalDateTime.now());
        category.setCreateUser(BaseContext.getCurrentId());
        category.setStatus(0);
        categoryMapper.insert(category);
    }
    @Override
    public void deleteById(Long id) {
//查询当前分类是否关联了菜品，如果关联了就抛出业务异常
        Integer count;
        count = dishMapper.countByCategoryId(id);
        if(count > 0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }

//查询当前分类是否关联了套餐，如果关联了就抛出业务异常
        count = setMealMapper.countByCategoryId(id);
        if(count > 0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }

//删除分类数据
        categoryMapper.deleteById(id);
    }

    @Override
    public List<Category> select(Integer type) {
       List<Category> categories =  categoryMapper.select(type);
       return categories;
    }
}
